Natural view flat panel for cathode ray tube

Details Natural view flat panel for cathode ray tube Natural view flat panel for cathode ray tube

2005-07-05

2005-07-05

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Screen

C313S47700R, C220S00210A

Reexamination Certificate

active

06914377

ABSTRACT:
A flat panel for a cathode ray tube for preventing a screen image from being shown concavely to a user or viewer includes a flat outer surface and a non-spherically formed inner surface, the non-spherically formed inner surface satisfying formula 1:in-line-formulae description="In-line Formulae" end="lead"?y1≦y2  (formula 1)in-line-formulae description="In-line Formulae" end="tail"?wherein y1represents a vertical distance between the outer surface and a refracted screen image on a central axis of the panel, and y2represents a vertical distance between the outer surface and the refracted screen image in peripheral areas other than the central axis of the panel, and the panel has a high transmission ratio equal to or greater than about 60% for preventing degradation of luminance due to a difference in thickness between a central section and a peripheral section of the panel.

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